Leaders Magazine,
Majalah, Jurnal, Buletin
North Corolina : The American Biographical Institute, 1986,
Buku Referensi
Windrow, Martin, author
Grange Books, 2000
Buku Referensi
Maxwell, John C., author
Menuju Insan Cemerlang (MIC), 2015
Buku Teks
Tatum Syarifah Adiningrum, author
[Publisher not identified], 2011
Artikel Jurnal